湿式双离合器动态充油特性与主油压相关性研究

摘要

Wet dual clutch pressure control system characteristic is one of the key point for the DCT transmission research and de⁃velopment. Considering the hydraulic resistance, hydraulic inductance, hydraulic inductance and flow force, a clutch hydraulic system model and the components dynamic calculation model were built. The AMESim software was used to simulate the dynamic performance. The test and simulation results have the same phenomena. It is shown that the clutch filling speed is not monotonic to the mainline pres⁃sure for the clutch P⁃VFS spool flow force. Choosing right mainline pressure can improve the clutch filling and response speed.%湿式双离合器充油特性是开发双离合器自动变速器离合器控制系统的关键之一。在考虑液压系统的液阻、液感、液容以及电磁阀液动力的前提下，建立了离合器压力控制系统以及各液压元件在充油过程中的动态模型，并利用AMESim对其进行动态仿真，通过试验验证了所建模型的正确性与有效性。仿真和试验结果发现：由于离合器电磁阀阀芯液动力的存在，离合器充油时的压力响应速度与系统主线压力设置呈非单调关系，存在最优区间。基于此研究结果，通过优化系统主线压力设置可以有效提高离合器充油速度，改善建压时间。